A three-banded clownfish (
Amphiprion ocellaris) navigates the anemones of the Andaman Coral Reef, India.
Our children all know the little clownfish Nemo, star of the Pixar film. But why does he have three stripes, rather than one or two? Developmental and evolutionary biology are revealing the answer.
When a stream enters a culvert, the flow can be concentrated so much that water flows incredibly fast. So fast, in fact, that small and juvenile fish are unable to swim against the flow and are prevented from reaching where they need to go to eat, reproduce or find safety.
Our new invention tackles one of the greatest impediments to fish migration in Australia: culverts, those tunnels or drains often found under roads.
Zebrafish are known for their black and gold stripes.
Zebrafish are known for their black and gold stripes, but researchers are still figuring out how pigment cells interact to form these patterns.
Bloede Dam (ca. 2016) near Ilchester, Maryland.
When a dam comes down this fall, a team of scientists will be there to track the environmental changes.
A fisherman checks his fish corral nets in the Cau Hai lagoon, Vietnam.
When it comes to small-scale fisheries, there is no one route to sustainability. Finding success stories can help map those paths.
Harnessing the awe-inspiring living light and power of bioluminescent organisms could change the human world.
Euphanerops, a primitive jawless fish from the World Heritage site at Miguasha, Quebec, which has now been found to have paired hind limb structures and copulatory sex organs.
François Miville-Deschênes with permission
Sexual organs similar to what we see in sharks and rays today appeared many millions of years ago in much more primitive ancient fishes than was previously thought.
A whale shark moves towards a piece of plastic in the ocean.
If we are truly invested in addressing the issue of marine plastic and offsetting the potential harms, we have to understand which fish eat plastic and which ones don't.
Ocean fish are changing where they live due to climate change.
Australia's oceans are warming faster than the global average, and fish are moving south as a result.
Bottlenose dolphins off the coast of New Jersey.
How can marine preserves best protect sea creatures that move in and out of them? Two ocean scientists describe new thinking about designing marine protected areas.
Australia was thought to have some of the most sustainable fisheries in the world, but a recent count has found that fish numbers have plummeted by a third.
New study in mice shows that omega-3 in mother protects babies' gut health for life.
An artist’s reconstruction of the ancient fish
A 400 million year old fossilised fish skull gives us very early and previously unknown clues about how boney fishes evolved into the vertebrates we see today on Earth - including us humans.
Pregnant women should be reassured that eating fish is good for their baby and is very unlikely to cause autism.
Exposure to omega-3 fatty acids during a child’s early years may play a role in reducing breast cancer risk later in life.
New research suggests omega-3s from seafood to be more effective at reducing breast cancer risk than those from plant-based sources.
Boat noise can interfere with the underwater communication of fishes and other marine animals.
The noise from motor boats, sonar and other industrial activity interferes with the underwater chatter of fishes.
Juvenile blue tang sheltering in restored staghorn coral.
With coral reefs in crisis around the world, many organizations are working to restore them by growing and transplanting healthy corals. A new study spotlights techniques that help restored reefs thrive.
Seahorse dads can give birth to more than 1000 baby seahorses at once.
Cindy Zhi/The Conversation NY-BD-CC
The seahorse dads carry the babies in a pouch.
The Amazon rainforest is fed by a rich network of creeks, streams and rivers. Informal road construction is now endangering this critical ecosystem.
Thousands of dirt roads crisscross the Brazilian Amazon, serving ranchers, loggers and miners. The area's fragile waterways — and the spectacular fish that live in them — pay a high price.
A large female Greenland shark observed near the community of Arctic Bay, Nunavut.
Using baited cameras scientists have captured some of the first underwater video footage of the elusive Greenland shark.